Remote Interface - Communication
Detect the insalled version
MB-Ruler / MB-Ruler Pro stores any information in the registry that
are important for other applications. They are stored using the key
HKEY_CURRENT_USER\Software\MB\MB-Ruler
HKEY_CURRENT_USER\Software\MB\MB-Ruler Pro
ein. Application shows the complete filename (including
path) and RemoteInterfaceVersion the verions number of the
remote interface. It must be 400 (decimal value) or higher.
Checking for a valid version in Delphi:
reg := TRegistry.Create;
if reg.OpenKey('Software\MB\MB-Ruler',true) then
begin
if
(FileExists(reg.ReadString('Application')) and
(reg.ReadInteger('RemoteInterfaceVersion')
>= 400)) then
begin
// OK - MB-Ruler - version
available
end;
end;
reg.Destroy;
and for MB-Ruler Pro
reg := TRegistry.Create;
if reg.OpenKey('Software\MB\MB-Ruler Pro',true)
then
begin
if
(FileExists(reg.ReadString('Application')) and
(reg.ReadInteger('RemoteInterfaceVersion')
>= 400)) then
begin
// OK - MB-Ruler Pro - version
available
end;
end;
reg.Destroy;
Check the installed version of MB-Ruler
For testing, if MB-Ruler is already running, use the windows API
fuction FindWindow with the parameter
"MB-Ruler".
If the return value of the function is 0, MB-Ruler must be startet,
is the return value is not 0, the return value is the windows
handle of MB-Ruler and MB-Ruler can be inittialized.
MBRulerHandle := FindWindow(nil,
'MB-Ruler');
if (MBRulerHandle = 0)
then // MB-Ruler must be starten
else // MB-Ruler is running and can be
initialized
Initialization of MB-Ruler
After the window handle of MB-Ruler has been detecte, MB-Ruler must
be initialzied to accept windows messages from other applications.
Use the windows API call
SendMessage(MBRulerHandle, WM_MBRULER_GENERELL,
GENERELL_ADDCLIENT, GENERELL_ADDCLIENT_WITHOUTLOGING);
After that, MB-Ruler is initialized.
The const are defined in the file
uRemoteInterfaceEventCodes.pas which is delivered together
with MB-Ruler.
Add on:
If MB-Ruler has to inform the client application about changes of
values, your application must call
SendMessage(MBRulerHandle, WM_MBRULER_GENERELL,
GENERELL_ADDCLIENT, window handle);
Window handle is the handle of the window, that will
receive the messages.
This window must be able to process messages with the ID
WM_MBRULER_GENERELL.
During the initialization, the messages
PostMessage(WM_MBRULER_GENERELL, GENERELL_ADDCLIENT, window
handle)
is send from MB-Ruler to the client application.
The client application must return the window handle as the
result of the call to be add to the message loop of
MB-Ruler.
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